CN202245230U - Hermetic feeder for vertical grinders - Google Patents

Abstract

The utility model provides a hermetic feeder for vertical grinders, which comprises a feed belt, a discharge pipe, a straight discharge pipe, a horizontal inserter and a negative pressure meter. The discharge pipe is arranged under the feed belt; the straight discharge pipe is connected with the lower end of the discharge pipe; the horizontal inserter is arranged at the middle of the straight discharge pipe, and the length of the horizontal inserter, which is inserted into the straight discharge pipe, can be adjusted by a driving mechanism, so that the gap between the horizontal inserter and the straight discharge pipe can be formed into a discharge space through which material can pass; the negative pressure meter is mounted on the top of the discharge pipe and connected with an automated control system and a central controller, moreover, the negative pressure meter is provided with an upper limit and a lower limit, consequently, when the straight discharge pipe is chocked, negative pressure starts to decrease from a normal value, the automated control system starts the driving mechanism to act when negative pressure reaches the lower limit, so that the horizontal inserter is opened and the straight discharge pipe is unchoked because of the scouring of the material, negative pressure increases, and when negative pressure increases to the upper limit, the automated control system drives the driving mechanism to close the horizontal inserter, so that negative pressure can be restored to the normal value.

Description

Vertical mill sealing feeder

Technical field

The utility model relates to a kind of vertical mill sealing feeder.

Background technology

Every raw material vertical mill producing cement generally can be equipped with a stand lock wind feeding machine, and in all serial lock feeding machine systems, lock wind, blanking are that an emphasis also is a difficult point; Each uses producer and vertical barreling to study carefully the institutes and does not all design effective lock wind devices.

If lock feeding machine inner vanes wearing and tearing; Lock wind effect will reduce greatly; A large amount of cold wind get into vertical grinders, and required heat when both having reduced vertical grinder raw material grinding has increased raw material circulating fan and kiln tail exhaust fan processing air quantity again; In other words both reduce raw material vertical mill output, increased power consumption again.So the lock wind of raw material vertical mill inlet point is had relatively high expectations.

After 1 year, blade wear is just very serious, will reach about 20mm in the operation of lock feeding machine for existing vertical grinding system; Lock wind effect will reduce about 80 percent; Thereby lose lock wind effect, raw material vertical mill unit-hour output will descend 10～20 tons, and raw material vertical grinding system ton power consumption increases about 1.5 degree; Add the increase that kiln tail exhaust fan draws air quantity, the comprehensive power consumption of ton grog will increase about 3 degree; Because what the lock feeding machine was carried is the bulky grain material, so the phenomenon that gets stuck appears in operation often, during operation vibration very big, it is disconnected often reductor base supports bar to be shaken, the upset accident takes place in reductor and motor under the effect of application force, existence is than potential safety hazard greatly; When the lime stone granularity is big, occur card easily and stop phenomenon, the annual card stops number of times about 20 times, therefore needs the frequent lock feeding machine is overhauled and integral replacing, wastes time and energy.

The utility model content

The purpose of the utility model is to above-mentioned situation: provide a kind of problem of leaking out that can solve above-mentioned lock feeding machine, can be according to the actual conditions of raw material aqueous ingredients, fall the vertical mill sealing feeder of feed naturally with the gravity of material, the utility model adopts following technical scheme:

A kind of vertical mill sealing feeder comprises: go into to grind belt, said sealing feeder also comprises: tremie pipe, and it is arranged on said below of going into to grind belt; The blanking straight tube, it is connected the below of said tremie pipe; Horizontal plate, it is arranged on the stage casing of said blanking straight tube; Vacuum table, it is installed in the top of said tremie pipe, and said vacuum table is connected with middle control with automation control system, and said vacuum table is provided with higher limit and lower limit.

Said horizontal plate stretches into the length of said blanking straight tube and can regulate through driver train, so that the gap of said horizontal plate and said blanking straight tube forms down material space, supplies material to pass through.

Said automation control system is programmable logic controller (PLC) PLC or DCS DCS.

The inwall of said tremie pipe is added with liner to increase the wear-resisting time.

Negative pressure is begun to descend by normal value when said blanking straight tube stops up, and when reaching lower limit, automation control system makes driver train begin action; To open horizontal plate; Because material washes away automatic mediation, negative pressure rises, when rising reaches higher limit; Automation control system makes driver train close horizontal plate, so that negative pressure is recovered normal value.

In the practice, higher limit can get-180 to-300pa, and more preferably, higher limit is got-200pa.Lower limit can get-15 to-30pa, and more preferably, lower limit is got-20pa.

Said driver train comprises cylinder or hydraulic actuating cylinder.

Term " PLC " is meant: PLC mainly is meant the programmable logic controller (PLC) of digital operation operation electronic system, is used to control the production process of machinery; Term " DCS " is meant: DCS.Term " middle control " is meant: control the operator in the cement mill; Its responsibility mainly is through controling computer, and secondly the operation of real-time ensuring machinery and equipment and staff's safety and steady is through the conditioning equipment parameter; Reach the optimum balance of output and quality, to realize the benefit optimization.

The principle of work of the utility model: set vacuum table higher limit (like ,-180pa to-300pa, preferred-200pa) with lower limit (15pa extremely-30pa; Preferably-20pa), when the situation such as tree root, bulk materials and tremie pipe buildup of meeting when the blanking straight tube take place to stop up, negative pressure by normal value (as;-100pa) can decline be tending towards null value, before the lower limit that reaches setting was also stopped up, automation control system (PLC or DCS) and middle control made cylinder or hydraulic actuating cylinder begin action; Driver train is opened horizontal plate; Because material washes away automatic mediation, mediation back negative pressure rises, when rising to the higher limit of setting; Horizontal plate is closed in cylinder or hydraulic actuating cylinder action, solves the smooth and easy problem of blanking.

The beneficial effect of the utility model: the utility model has solved the leaking out of existing lock feeding machine, has vibrated the problem big, that fault rate is high; Can be according to the actual conditions of raw material aqueous ingredients, fall feed naturally with the gravity of material, the inleakage that grinding machine uses greatly reduces, and opens and closes through negative pressure variation controlling level plate; Avoid getting stuck; The circulating fan power consumption has obtained a large amount of saving, has reduced productive costs, has greatly improved production efficiency.

Description of drawings

Fig. 1 is the utility model structural representation.

Mark among the figure: 1 for going into to grind belt, and 2 is tremie pipe, and 3 are the blanking straight tube, and 4 is horizontal plate, and 5 is vacuum table, and 6 is cylinder.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is done detailed explanation.

As shown in Figure 1, according to a preferred embodiment of the utility model, a kind of vertical mill sealing feeder comprises: go into to grind belt 1; Tremie pipe 2, it is arranged on said below of going into to grind belt 1; Blanking straight tube 3, it is connected the below of said tremie pipe 2; Horizontal plate 4, it is arranged on the stage casing of said blanking straight tube 3, and the length that said horizontal plate 4 stretches into said blanking straight tube 3 can regulate through cylinder 6, so that the gap of said horizontal plate 4 and said blanking straight tube 3 forms down material space, the confession material passes through; Vacuum table 5, it is installed in the top of said tremie pipe 2, and said vacuum table 5 is connected with middle control with PLC; And said vacuum table is provided with higher limit-200pa and lower limit-20pa, and negative pressure is begun to descend by normal value-100pa when stopping up with the said blanking straight tube of box lunch, when reaching lower limit-20pa; PLC makes cylinder begin action, to open horizontal plate, because material washes away automatic mediation; Negative pressure rises; When rising reached higher limit-200pa, PLC made cylinder close horizontal plate, so that negative pressure is recovered normal value-100pa.

In addition, according to a preferred embodiment of the utility model, the inwall of tremie pipe is added with liner to increase the wear-resisting time.

In addition, according to another embodiment of the utility model, its difference is that said PLC replaces with DCS.

In addition, according to the another embodiment of the utility model, its difference is that said cylinder replaces with hydraulic actuating cylinder.

In addition, according to the another embodiment of the utility model, wherein, the upper limit is produced-180pa, and lower limit is got-15pa.

In addition, according to the another embodiment of the utility model, wherein the upper limit is produced-300pa, and lower limit is got-30pa.

Beneficial effect

Through measuring and calculating; The raw mill system leak out mainly be four mill doors leak out account for 30%, the grinding machine tremie pipe leak out account for 35%, the lock feeding machine leaks out and accounts for 35%; Negative pressure is-550pa when going into to grind the vacuum table demonstration use lock feeding machine of installing at belt head place; And through dropping to-100pa after the vertical mill sealing feeder improvement, the minimizing grinder system always leaks out: (550-100)/and 550*35%*100%=23.3%.With existing grinding machine operational factor; Mill output 230t/h, circulating fan electric current 110A is 85.2% of rated current 129A; So per hour drawing air quantity is 85.2% * 450000m3 (blower fan nominal air delivery)=383400m3; Should about 550-800g/m3, get intermediate value 675g/m3 by dust-laden (finished product) concentration that goes out to grind in the gas again, the actual air quantity that only needs usefulness in the time of can calculating grinding machine 230t/h: 230t/h*1000000/675g/m3 σ 340740m3.The per hour diligent 1850kwh of circulating fan reality, directly power saving after improving through vertical mill sealing feeder: (383400m3-340740m3) * 23.3%/383400m3*1850kwh=48kwh.Operation factor by 75% calculated in 1 year 365 days: 365 * 24 * 75% * 48kwh=31.5, ten thousand kwh.The merit done of raw material circulating fan is also wanted identical work done equally on the tail exhaust fan in addition, so should double i.e. 31.5 ten thousand kwh*2=63, ten thousand kwh.Adding the lock feeding machine self has a 11kw motor, and normal operation has the electric current about 12A, every stand lock wind feeding machine operation factor 75%, per hour power consumption 6kwh.Computing formula is following: 6kwh * 24h * 365 * 75%=39420kwh adds up to power saving 66.94 ten thousand kwh.

Claims (8)

1. vertical mill sealing feeder, comprising: go into to grind belt (1), it is characterized in that, said sealing feeder also comprises: tremie pipe (2), it is arranged on said below of going into to grind belt (1); Blanking straight tube (3), it is connected the below of said tremie pipe (2); Horizontal plate (4), it is arranged on the stage casing of said blanking straight tube (3); Vacuum table (5), it is installed in the top of said tremie pipe, and said vacuum table (5) is connected with middle control with automation control system, and said vacuum table is provided with higher limit and lower limit.

2. vertical mill sealing feeder according to claim 1 is characterized in that, said automation control system is programmable logic controller (PLC) PLC or DCS DCS.

3. vertical mill sealing feeder according to claim 1 is characterized in that, the inwall of said tremie pipe is added with liner to increase the wear-resisting time.

4. vertical mill sealing feeder according to claim 1, it is characterized in that: said driver train comprises cylinder or hydraulic actuating cylinder.

5. vertical mill sealing feeder according to claim 1 is characterized in that, said higher limit gets-180 to-300pa.

6. vertical mill sealing feeder according to claim 5 is characterized in that said higher limit is got-200pa.

7. vertical mill sealing feeder according to claim 1 is characterized in that, said lower limit gets-15 to-30pa.

8. vertical mill sealing feeder according to claim 7 is characterized in that said lower limit is got-20pa.

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